Four USB AC adapter for iPhone/Mobile phone/MP3/GPS--C11World voltage acceptance 110-220VAC with Power Output 5V/2.1A.4 USB power ports charge up to four mobile devices simultaneously through just one wall socket. Eliminates the need for multiple wall chargers and outlets red LED power indicator.Four interchangeable AC plugs for US, UK, AU, Euro, can be used with most common power outlets over 150 countries in the world.AC plugs can be changed easily in seconds by pressing the button at bottom of the main unit for unlocking the plug. Designed to charge iPhone and mobile phone at current 1A.